Nonlinear optical (NLO) materials are critical in generating coherent light through frequency conversion, e.g., second harmonic generation (SHG). From the ultraviolet (UV) to the infrared (IR), NLO materials have expanded the range of the electromagnetic spectrum accessible by solid-state lasers. Wavelengths where NLO materials are still needed include the UV (~200 – 400nm) and deep UV (< 200nm). Coherent deep-ultraviolet (DUV) light has a variety of technologically important uses including photolithography, atto-second pulse generation, and in advanced instrument development. Design strategies will be discussed, as well as synthetic methodologies. In addition, the crystal growth, characterization, and structure-property relationships in new UV and DUV NLO materials discovered in our laboratory will be presented. Finally, our crystal growth capabilities and recent crystal growth of functional materials will be described.

Department of Chemistry, University of Houston

P. Shiv Halasyamani is a full-time professor in the Department of Chemistry at the University of Houston, and associate editor of the internationally renowned journal Inorganic Chemistry and ACS Organic and Inorganic Au. He has served as the editorial advisory member, deputy editor and guest editor of internationally renowned journals such as Chem. Mater., Inorg. Chem., Mater. Res. Bull. and J. Solid State Chem. He has won many domestic and international awards such as the ExxonMobil Solid State Award, Beckman Young Investigator, High-End Foreign Experts Project Award – China, and the Roy-Somiya Award: International Solvothermal and Hydrothermal Association. He is also a Beckman Foundation Executive Committee Member, and an AAAS Fellow. Prof. Halasyamani’s research involves the design, synthesis, crystal growth, characterization, and structure-properties of functional inorganic solid-state materials. He has published over 240 papers with an h-index of 61 and over 12,000 citations.

报告时间：2021-11-16 10:00 (UTC+8)

腾讯会议：897446599

ZOOM：4583754881

联系人：刘泉林 赵静

上海理工大学：禹德朝

禹德朝教授于2014年在华南理工大学获得工学博士学位，随后分别在美国罗格斯大学、荷兰乌得勒支大学、华南理工大学、南京邮电大学担任博士后、研究员、特聘研究员、高层次人才等职位，获得2020年度上海市海外高层次人才和2020年广东省自然科学“一等”奖（排名4/5）。2021年入职上海理工大学光电信息与计算机工程学院，加入庄松林院士领衔的“超精密光学制造”团队。目前，以第一/通讯作者在Light Sci. Appl. ，Adv.Opt. Mater.，Phys. Rev. B (Appl.)，Appl. Phys. Lett.等学术期刊发表论文18篇，担任国际学术期刊Crystals的Guest Editor、Frontiers inChemistry的Topical Editor和Frontiers in Photonics的Review Editor。主要研究方向为微纳米晶多光子发光材料、有机-无机杂化体系、纳米光子学及其在新型光电子器件和生物医学领域的应用。

报告内容：

稀土离子具有丰富的电子能级结构，其光子吸收与发射几乎覆盖了整个紫外-可见-近红外光谱区域，被广泛应用于制备各种发光材料。尽管稀土离子4f壳层内的电子跃迁相对稳定，但掺杂浓度调控的离子间相互作用、声子能量决定的非辐射弛豫和辅助的能量传递、温度促进的非辐射跃迁等都将对稀土离子(对）的发光过程产生不可忽略或本质的影响。最近，基于近红外量子剪裁下转换发光、蓝光到紫外上转换和荧光温度探针发光现象，我们对蓝光激发下Tm³⁺/Yb³⁺共掺体系、Ho³⁺单掺体系和Pr³⁺/Gd³⁺共掺体系的发光特性展开了系统的研究，对其中所涉及的掺杂浓度(~0.001-0.3)、声子能量(~370-1050 cm^-1)和温度(~30-900 K)(综合)调控的能量传递机制进行了初步的探究，基于样品的稳态-动态光谱学实验数据分析和理论模拟与计算，得出了一系列有指导意义的结论。

报告时间：2021年10月15日

报告地点：主楼31小会议室